lithtrix_blob_upload · Lithtrix MCP: Risk & Policy

WHAT IT DOES

What lithtrix_blob_upload does on Lithtrix

AI agents use lithtrix_blob_upload to create or update resources in Lithtrix — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Lithtrix environment.

WHY IT NEEDS A POLICY

Why lithtrix_blob_upload needs a policy

The tool creates or modifies data by uploading binary blobs to a persistent storage system. This is a Write operation—it reversibly stores data and does not delete, execute code, or move money.

From the tool's definition Tool description states: 'Upload binary bytes via PUT /v1/blobs (raw body + Content-Type).' This is a PUT operation that creates or stores blob data in persistent storage.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

lithtrix_blob_upload Rate-limited

lithtrix_blob_upload stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "lithtrix_blob_upload": {
      "limits": [
        {
          "counter": "lithtrix_blob_upload_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

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Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Lithtrix, so you can run agents against it safely.

FAQ

Questions about lithtrix_blob_upload

What does the lithtrix_blob_upload tool do? +

Upload binary bytes via PUT /v1/blobs (raw body + Content-Type). It is categorised as a Write tool in the Lithtrix MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on lithtrix_blob_upload? +

Register the Lithtrix MCP server in PolicyLayer and add a rule for lithtrix_blob_upload: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches Lithtrix. Nothing to install.

What risk level is lithtrix_blob_upload? +

lithtrix_blob_upload is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit lithtrix_blob_upload? +

Yes. Add a rate_limit block to the lithtrix_blob_upload rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.

How do I block lithtrix_blob_upload completely? +

Set action: deny in the PolicyLayer policy for lithtrix_blob_upload. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.

What MCP server provides lithtrix_blob_upload? +

lithtrix_blob_upload is provided by the Lithtrix MCP server (lithtrix/lithtrix-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.